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PRINTER OPERATORS MANUAL 



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INTRODUCTION 

NOTE: Please read this manual carefully and 
throughly before operating your ATARI® 820™ 
Printer. The Printer is a delicate machine and can 
be damaged by improper use. 


The ATARI 820™ Printer provides printout for the 
ATARI 400™ and the ATARI 800™ Personal Com¬ 
puter Systems. Many combinations of hardware 
and software make use of the Printer. Application 
programs provide an option to print out results 
whenever appropriate. BASIC and ASSEMBLY 
LANGUAGE Cartridges include Printer commands, 
as does the ATARI FILE MANAGER & DISK 
OPERATING SYSTEM (DOS), which is available for 
the ATARI 800 


UNPACKING 

Your ATARI 820 Printer comes with: 

• Printer 

• Bond Paper Roll 

• Paper Mandrel 

• Ribbon 

• Data Cord 

• Instruction Manual 

• Attached Power Cord 

Save your original packing materials and reuse 
them if you need to ship your Printer or store it for 
long periods. 


PAPER- 

MANDREL 
PAPER RELEASE LEVER 
PLATEN 
TEAR BAR 
RIBBON GUIDES 
PRINTING HEAD 



RIBBON DEFLECTOR 
RIBBON TENSION BRACKE 
RIBBON POST 
SPOOL 
CAM DRIVE 








SETTING UP THE PRINTER 



Follow the steps below to set up your Printer and 
connect it to the computer. You will find detailed 
diagrams and instructions on the following pages. 

DO NOT OPERATE THE PRINTER WITHOUT RIB¬ 
BON OR PAPER or you may damage the printing 
head solenoids. 


1. Plug the power cord into a 110-115 volt AC 
outlet (with the power switch OFF). 

2. Plug the data cord into the serial I/O port 
(labeled PERIPFIERAL on the Console), or if 
another peripheral is in use, into the jack label¬ 
ed I/O CONNECTOR on that peripheral. Plug 
the data cord into either jack labeled I/O CON¬ 
NECTOR on the printer. 

3. Turn the power switch (PWR.) ON. 

4. Press the paper advance (PAPER ADV.) button 
once. 

5. Open the printer cover and load the paper 
around the platen as shown in the photos on 
the following pages. 

6. Check the ribbon for proper installation. 


PRINTER TIMEOUT 

In order to prevent overheating, the Printer is 
equipped with an automatic timeout cycle which 
halts printing for approximately three seconds. 
During continuous use you will notice that the 
printer stops periodically and then continues. Fre¬ 
quent timeouts indicate that the Printer is 
operating CORRECTLY. Any attempt to override 
the timeout period is likely to damage your Printer. 


2 



























FRONT VIEW 


BACK VIEW 



Fuse - Twist in direction of arrow to 
remove and replace fuse. 

I/O Connectors - Identical jacks ac¬ 
commodate data cords from Console or 
other peripheral components. Con¬ 
nections may be made in any order 
with either jack. 


Paper Advance Button - Advances 
paper automatically. 


pwr. Power ON/OFF Switch 


PWm. 

om Power Indicator Light 


IMPORTANT - Always replace a fuse only with one 
that has the same electrical ratings. (2 AMP, Type 
3AG) 



INSTALLING THE RIBBON 


Remove the two ribbon spools from the package. 
The white spool (containing the new ribbon) fits on 
the right ribbon post; the blue spool (which is the 
empty one) fits on the left ribbon post. The ribbon 
must follow the same path as shown in the illustra¬ 
tion. When properly installed, the ribbon is posi¬ 


tioned in front of the ribbon tension bracket (the 
side closest to you), and around the two ribbon 
guides (the side farthest away from you). 

Make certain the ribbon is installed correctly 
before operating the Printer. 


3 







LOADING THE PAPER 

Open the printer cover by pulling up on both sides. 
Check the printer mechanism — make sure the 
printing head is on the left side as shown in the il¬ 
lustration. If necessary, press the PAPER ADV. but¬ 
ton to position the printing head properly. This 
must be done before attempting to load the paper 
and no attempt should be made to position the 
printing head manually. 

DO NOT ATTEMPT TO LOAD PAPER OR INITIATE 
PRINTING WHEN THE PRINTING HEAD IS IM¬ 
PROPERLY POSITIONED OR YOU MAY DAMAGE 
THE PRINTER. 

The manual paper advance should turn 
counterclockwise or away from yourself with 
moderate pressure. Turning the manual paper ad¬ 
vance clockwise or toward yourself could damage 
it as could forcing it in any manner. 

For easiest loading, cut off the end of the paper to 
create a smooth edge. You may want to leave the 
paper roll out of the Printer and off to the side 
when loading, or you may want to place the roll in 
the depression behind the platen, whichever is 
easiest for you. Slide the mandrel into the paper 
roll. If loading from the depression behind the 
platen, be sure the ends of the mandrel click into 
their slots in the printer case. When the paper is 
properly installed the Printer will close easily over 
a full roll (314—inch diameter). 

The paper roll sits in the depression behind the 
platen. The paper passes over the metal bar which 
is visible below and behind the platen and is guided 
by two white nylon sliders on the bar. It feeds 
around the platen, under the clear plastic paper 
guide, the ribbon, and the tear bar, and then out the 
top of the Printer. 


Feed the end of the paper over the bar and under 
the back edge of the platen. To advance the paper 
around the platen, press the PAPER ADV. button 
and hold it until the paper comes out from under 
the tear bar OR turn the manual paper advance 
counterclockwise (away from yourself). It may help 
to pull the PAPER RELEASE LEVER forward when 
loading the paper. 

Always check to make sure the paper is straight. If 
you need to align the paper around the platen pull 
the PAPER RELEASE LEVER forward and pull up the 
paper roll a few inches. 








PRINTER COMMANDS 


Each piece of software, whether cartridge, cassette, or diskette based, will have its own commands for acti¬ 
vating the Printer. Consult the software manual which accompanies the software you wish to use with the 
Printer for complete Printer commands. 

BASIC — When you are familiar with ATARI BASIC Computing Language you will know how to use the com¬ 
mands PRINT and LIST. To PRINT on the Printer instead of the screen, replace PRINT with LPRINT in your 
BASIC source programs. To LIST on the Printer, use LIST"P:" or L."P instead of LIST. (No closing quotation 
marks needed.) Here's an example: Type this BASIC Program into your computer: 


DO THIS 

TYPE 


10 P RINT "THE 

re *" rm\m 

20 LPRINT "THE 

here ♦" tmm 


PRINT COMMAND COMES OUT HE 
LPRINT COMMAND COMES OUT 


When you RUN this program each PRINT statement will appear on the screen like this: 


DO THIS 

TYPE 

RUN 

PUSH 


RETURN 


SEE THIS 



Your Printer will print only the LPRINT lines like this: 

THE LPRINT COMMAND COMES OUT HERE♦ 

To see your program again: 


DO THIS 

TYPE 

LIST 

PUSH 


RETURN 


SEE THIS 


10 PRINT "THE PRINT COMMAND COMES OUT HE 1 
RE. " 1 
20 LPRINT "THE LPRINT COMMAND COMES OUT 
HERE." 

READY 






5 






To get a printout of your program: 
DO THIS 

TYPE 

LIST -P 

PUSH 


RETURN 


The ATARI BASIC REFERENCE MANUAL contains a complete description of all ATARI BASIC Language com¬ 
mands. (Also see News Bits No. 2) 


SEE THIS 


10 PRINT "THE PRINT COMMAND COMES OUT HE 
RE * M 

20 LPRINT "THE L.PRINT COMMAND COMES OUT 
HERE ♦ " 


ATARI FILE MANAGER & DISK OPERATING SYSTEM (DOS) — The Disc Operating System Manual will pro¬ 
vide you with complete instructions on using the DOS software to access the Printer and other peripheral 
components. 


TECHNICAL SPECIFICATIONS 
AND REORDER NUMBERS 


ATARI 820 Printer 

• high resolution, 5X7 dot matrix, impact printer 

• 40 characters per line 

• horizontal and vertical alphanumeric 
characters 

• power switch and indicator light 

• paper advance button 

• built-in microprocessor 

• crystal controlled for data accuracy 

Standard Roll Paper 

• width, 3 7/8 inches X 3-1/4 inches diameter 
available at most stationary stores 

Mandrel Ribbon 

• ATARI part no. C014853 

• 5/16-inch 

• ATARI part no. C014854 
Addressograph/Multigraph part no. 

116-2395-366 

Printing Speed 

• approximately 1000 lines per minute 
Data Cord 

• ATARI part no. CA14122 
Fuses 

• 2 AMP type 3AG fast blow ATARI part no. 
46-2032001 


Locations for ordering inked ribbons: 

AM OFFICE SUPPLY 
7209 St. Clair Ave. 

Cleveland, OH 44103 

(Or your nearest Addressograph/Multigraph (AM) dealer.) 

CALIFORNIA RIBBON & CARBON CO. 

5816 Pine Avenue 
Maywood, CA 90270 

COLUMBIA RIBBON & CARBON MFC. CO., INC. 

45 Executive Drive 
Plainview, NY 11803 

KLEEN STRIKE MFC. CO., INC. 

8173 Main Street 
Ellicott City, MD 21043 



6 


ENTRY LEVEL PRINTER & DISK DRIVE 
OPERATIONS IN BASIC 


When the power is turned OFF on a computer, all 
programs or data stored in memory are lost. The 
810 Disk Drive is used to store programs and to in¬ 
sert (load) programs back into the computer 
memory bank when required for use. 

Reference 

I. To store and retrieve programs on diskette: 

A. Power up disk unit 

B. Put diskette in disk unit 

C. Power up computer 

D. To save program on diskette — 

1. Type in program - 


Sample Program 

DO THIS 

TYPE 

100 REM*** INTEREST 

110 PRINT * IF YOU TYPE THE AMOUNT OF P 
RINCIPAL * 

120 PRINT 'AND THE INTEREST RATE PER Y 
EAR t I WILL" 

130 PRINT 'SHOW YOU HOW YOUR MONEY GR0 
WSr YEAR BY * 

140 PRINT 'YEAR. TO STOP ME t PRESS THE 
BREAK KEY.' 

150 PRINT 

160 PRINT ■PRINCIPAL 1 ; 

165 INPUT P 

170 PRINT "INTEREST RATE 1 ; 

175 INPUT R 

180 LET N=1 

190 PRINT 

200 LET A=P*(1+R/100) a N 
210 PRINT "YEAR = *;N 
220 PRINT 'AMOUNT ="JA 
230 LET N=N+1 
240 GOTO 190 


SEE THIS 



IF YOU TYPE THE AMOUNT OF PRINCIPAL 
ANDTHE INTEREST RATE PER YEAR» I WILL 
SHOW YOU HOW YOUR MONEY GROWS. YEAR BY 
YEAR. TO STOP ME. PRESS THE BREAK KEY. 

PRINCIPAL? 1000 
INTEREST RATE? 6 

YEAR = 1 

AMOUNT = 1059.99999 
YEAR = 2 

AMOUNT = 1123.59997 


YEAR = 3 

AMOUNT = 1191.01596 




to stop program. 


2. Type SAVE "D:NAME" - 

3. BASIC will save program NAME on 
diskette. 


DO THIS 

TYPE 

SAVE -d:interest* 

Above Program is recorded on Diskette. 


7 



Reference 


Sample Program 


E. To retrieve program from diskette — 

1. Type LOAD "D:NAME" - 

2. Program can now be RUN, changed, 
etc. 

3. Type LIST 


F. To RUN program from diskette 
1. Type RUN "D:NAME" - 


DO THIS 

TYPE 

LOAD "DJINTEREST" 

SEE THIS 



100 REM*** INTEREST 

110 PRINT * IF YOU TYPE THE AMOUNT OF P 
RINCIPAL■ 

120 PRINT 'AND THE INTEREST RATE PER Y 
EAR. I WILL' 

130 PRINT 'SHOW YOU HOW YOUR MONEY GRO 
US. YEAR BY' 

140 PRINT ‘YEAR. TO STOP ME. PRESS THE 
BREAK KEY.* 

150 PRINT 

1<S0 PRINT 'PRINCIPAL'» 

165 INPUT P 

170 PRINT 'INTEREST RATE*; 

175 INPUT R 


190 PRINT 

200 LET A=P*<1+R/100) a N 
210 PRINT -YEAR = *;n 
220 PRINT 'AMOUNT = ';A 
230 LET N-N+l 
240 GOTO 190 



DO THIS 

TYPE 

RUN “D:INTEREST" 

SEE THIS 


IF YOU TYPE THE AMOUNT OF PRINCIPAL. 
ANDTHE INTEREST RATE PER YEAR. I WILL 
SHOW YOU HOW YOUR MONEY GROWS. YEAR BY 
YEAR. TO STOP ME. PRESS THE BREAK KEY. 

PRINCIPAL? 

INTEREST RATE? 


8 


If you have a program that you wish to edit 
(change), use the commands listed below. Or, if you 
wish to save the original program, as well as the 
modified version, give the modified program a new 
name. 

G. To save listed version on diskette — 

1. Type LIST "D:NAME", N, M Lines N — 
through M will be listed to diskette 

H. To retrieve listed version on diskette — 

1. Type ENTER "D:NAME" 

This will merge diskette file with data 
which is already in memory. 

2. Type LIST 


Change name of the revised program if you wish to 
retain both the original and revised programs. 



DO THIS 

TYPE 

LIST "DJINTEREST" 150,240 
SEE THIS 



170 PRINT 'INTEREST RATE'; 
175 INPUT R 

180 LET N=1 

190 PRINT 

200 LET A=F'*(1+R/100) a N 
210 PRINT 'YEAR = ';N 
220 PRINT 'AMOUNT ='fA 
230 LET N-N+l 
240 GOTO 190 



NOTE: Numbers 100 to 140 were deleted from 
program. 




Reference 


Sample Program 
Write 


II. To store and retrieve data on diskette 
from a program: 


A. Power up disk unit 

B. Put diskette in disk unit 

C. Power up computer 

D. To store data on diskette from program — 

1. OPEN #1, 8, 0, "D:DATA" - 

tells computer to allow writing to 
diskette file named DATA 

2. PRINT #1; X; Y; Z - 

writes a record that looks like: X, Y, Z 
(X, Y, & Z are numbers) 

3. CLOSE #1 - 

When program is done this tells com¬ 
puter that file is finished. 


DO THIS 

TYPE 


1 REM THIS PROGRAM WRITES A FILE OF 
CHECK NUMBERS AND THEIR AMOUNTS 
5 DIM CHECKNAMEi<40> 

10 OPEN *1» 8 r Or * D * CHECKS 1 
20 CHECKAMT=0! CHECKNAME*=‘’ 

25 PRINT ‘CHECK NUMBER *i 

30 INPUT CHECKNUM 

35 IF CHECKNUM=0 THEN 80 

40 PRINT ‘CHECK AMOUNT * r 

50 INPUT CHECKAMT 

60 PRINT ‘WHO WAS CHECK TO’f 

70 INPUT CHECKNAME* 

80 PRINT #1? CHECKNUM r’r‘r CHECKAMT r'r‘} CHECKNAME* 
90 IF CHECKNUM >0 THEN PRINT: GOTO 20 
100 CLOSE *1 


This is RUN of above program: 

SEE THIS 



CHECK NUMBER?100 
o CHECK AMOUNT?12.51 
°WH0 WAS CHECK TO? JOHN SMITH 

CHECK NUMBER?101 

CHECK AMOUNT?24.35 

WHO WAS CHECK TO? GEORGE BROWN 

CHECK NUMBER?102 

CHECK AMOUNT?102.67 

WHO WAS CHECK TO? HEAVY CHEVY 

CHECK NUMBER?0 




This is what the information looks like on disk: 

100,12.51,JOHN SMITH 
101,24.34,GEORGE BROWN 
102,102.67,HEAVY CHEVY 
0,0 


9 




Reference 


Sample Program 
Read 


E. To retrieve data from diskette from 

program — 

1. OPEN #1, 4, 0, "D:DATA" - 

tells computer to allow reading from 
diskette file named DATA 

2. INPUT #1, X, Y, Z - 

Reads a record like the one created in 
D above. 

3. CLOSE #1 - 

Tells computer you are done with file. 


SEE THIS 



1 REM THIS PROGRAM READS A FILE OF 
CHECK NUMBERS AND THEIR AMOUNTS 
5 DIM CHECKNAME*(40) 

10 OPEN #1»4*0» ’DJCHECKS’ 

15 PRINT ’CHECK # AMOUNT WHO TO’ 

17 PRINT’_ 


20 INPUT *1SCHECKNUMrCHECKAMT»CHECKNAME* 
30 IF CHECKNUM=0 THEN 100 

40 PRINT CHECKNUMf’*■!CHECKAMT t CHECKNAME* 
50 GOTO 20 
100 CLOSE *1 




PRINTER 

Reference 

I. To Print to Printer: 

A. Power up computer and Printer 


B. Type LPRINT "HELLO" and HELLO will - 
be typed on Printer 

C. Wherever you can use PRINT you can use 
LPRINT 


Sample Program 
Read and print 


SEE THIS 



3 rint-Out of above program: 

SEE THIS 


CHECK # 

AMOUNT 

WHO TO 

100 

♦12*51 

JOHN SMITH 

101 

♦24*35 

GEORGE BROWN 

102 

♦102*67 

HEAVY CHEVY 


10 


See the DISK OPERATING SYSTEM (DOS) 
manual for complete details. 













NOTES